added missing i18n translation, and vis package

package.json

@@ -230,6 +230,7 @@
 		"underscore.string": "^3.3.5",
 		"url-polyfill": "^1.1.5",
 		"uuid": "^3.3.2",
+		"vis": "^4.21.0",
 		"webdav": "^2.0.0",
 		"wolfy87-eventemitter": "^5.2.5",
 		"xml-crypto": "^1.0.2",

packages/rocketchat-i18n/i18n/en.i18n.json

@@ -1372,6 +1372,7 @@
   "FEDERATION_Test_Setup_Success": "Your federation setup is working and other servers can find you!",
   "FEDERATION_Unique_Id": "Unique ID",
   "FEDERATION_Unique_Id_Description": "This is your federation unique ID, used to identify your peer on the mesh.",
+  "FEDERATION_Error_user_is_federated_on_rooms": "You can't remove federated users who belongs to rooms",
   "Field": "Field",
   "Field_removed": "Field removed",
   "Field_required": "Field required",
@@ -2242,10 +2243,9 @@
   "Notify_active_in_this_room": "Notify active users in this room",
   "Notify_all_in_this_room": "Notify all in this room",
   "Num_Agents": "# Agents",
-  "Number_of_active_peers": "Number of active peers",
   "Number_of_events": "Number of events",
   "Number_of_federated_users": "Number of federated users",
-  "Number_of_inactive_peers": "Number of inactive peers",
+  "Number_of_federated_servers": "Number of federated servers",
   "Number_of_messages": "Number of messages",
   "OAuth Apps": "OAuth Apps",
   "OAuth_Application": "OAuth Application",